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18 lines
705 B
C
18 lines
705 B
C
#include <unistd.h>
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#include <stdio.h>
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#include <sys/mount.h>
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#define __USE_GNU
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#include <sched.h>
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int main(int argc, char* argv[]) {
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unshare(CLONE_NEWNS);
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mount("/dev", "/sysroot/dev", NULL, MS_MOVE, NULL);
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mount("/proc", "/sysroot/proc", NULL, MS_MOVE, NULL);
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mount("/sys", "/sysroot/sys", NULL, MS_MOVE, NULL);
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mount("/run", "/sysroot/run", NULL, MS_MOVE, NULL);
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if (chdir("/sysroot") < 0) { fprintf(stderr, "Unable to chdir!\n"); }
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mount("/sysroot", "/", NULL, MS_MOVE, NULL);
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if (chroot(".") < 0) { fprintf(stderr, "Failed to chroot!\n"); }
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if (chdir("/") < 0) { fprintf(stderr, "Unable to chdir after chroot!\n"); }
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execl("/sbin/init", "/sbin/init", NULL);
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}
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